Alloy, Protective Layer for Protecting a Component Against Corrosion and/or Oxidation at High Temperatures, and Component
OwnerWerner Stamminventor
Life of this patent
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Abstract
Known protective layers with a high Cr content and additionally a silicon form brittle phases, which become even more brittle under the influence of carbon during use. The protective layer according to the invention has the composition 27% to 31% nickel, 23% to 29% chromium, 7% to 11% aluminum, 0.5% to 0.7% yttrium and/or at least one equivalent metal from the group comprising scandium and rare earth elements, optionally 0.6% to 0.8% silicon, optionally 0.5% to 0.7% zirconium and the remainder cobalt.
Claims18
-18. (canceled)
An alloy, comprising (in wt %):
- 27% to 31% nickel;
- 23% to 29% chromium;
- 7% to 11% aluminum;
- 0.5% to 0.7% yttrium or at least one metal selected from the group consisting of scandium and the rare earth elements;
- optionally 0.6% to 0.8% silicon;
- optionally 0.5% to 0.7% zirconium;
- and
- remainder cobalt.
A protective layer for protecting a component against corrosion and oxidation at high temperatures, comprising (in wt %):
- 27% to 31% nickel;
- 23% to 29% chromium;
- 7% to 11% aluminum;
- 0.5% to 0.7% yttrium or at least one metal selected from the group consisting of scandium and the rare earth elements;
- optionally 0.6% to 0.8% silicon;
- optionally 0.5% to 0.7% zirconium;
- and
- remainder cobalt.
A component of a gas turbine having a protective layer for protection against corrosion and oxidation at high temperatures, comprising (in wt %):
- 27% to 31% nickel;
- 23% to 29% chromium;
- 7% to 11% aluminum;
- 0.5% to 0.7% yttrium or at least one metal selected from the group consisting of scandium and the rare earth elements;
- optionally 0.6% to 0.8% silicon;
- optionally 0.5% to 0.7% zirconium;
- and
- remainder cobalt.
Dependencies are inferred from the claim text.